Shaking device for cleaning filters



W. F. L. BETH.

SHAKING DEVICE FOR CLEANING FILTERS. APPLICATION FILED FEB. 3. 1922.

Patented Oct. 24, 1922.

Patented Get, 2 2-, i922,

l dthlll WILHELIE FRIEDRICH LUDV/IG- BETH, 3F LUBE-CK, GERMANY.

SHAKING DEVICE FOR CLEANING FILTERS.

Application filed February 3, 1922.

To all whom it may concern:

Be it known that I, WrLHnLM Presenter-r LUDWIG BETH, a citizen of Germany, residing at Lubeck, Germany, have invented cer tain new and useful Improvements in Shaking Devices for Cleaning Filters (for which I have filed applications in Germany Hebruary 12, 1921, and Netherlands August 9, 1921), of which the following 1s a specification.

My invention relates to improvements n shaking devices for cleaning filters. As is known to those skilled in the art in systems of this class the tubular filter elements are suspended from a rocking lever which is adapted to be operated for shaking the filter elements, which lever is temporarily set in shaking position and is normally supported in elevated position forstretching the filter elements, for which purpose the fulcrum of the lever and a suitable supporting member are shifted relatively to each other, as has been described in a patent of the United States previously granted to me and bearing the Number 1,889,481.

One of the objects of the improvements is to provide a system of this type which is simple in construction. With this ob ect in viewniy invention consists in the matters to be described hereinafter and particularly pointed out in the appended claims. I

F or the purpose of explaining the invention an example embodying the same has been shown in the accompanying drawings, in which the same letters of reference have been used in all the views to indicate corresponding parts. In said drawings,-

Fig. l, is a side view of the system showing the lever from which the filter elements are suspended in operative or shaking position, and

Fig. 2, is a similar view showing the said lever in elevated position and ready for being thrown into shaking position.

' In the example shown in the drawings the filter elements a are suspended from a horizontal bar a? which is suspended by means of a rod a from a rocking lever 5 having its fulcrum at 9" and located with its rear end in position for rocking engage ment with a cam or star wheel (5 keyed to a rotary shaft 3. At the left of the ful crum r a rocker g is located the cam face 9 of which is adapted for engagement with a lug secured to the lever Z). The rocker q is rigidly connected with a weighted tilt- Serial No. 533,874.

ing lever 2 adapted when rocked in the manner presently to be described to set the rocker 9 into position for lifting the lever Z) or into the inoperative position shown in 1g. 1. To the tilting lever a link a is jointed at o which link is bifurcated at its free end and straddles the shaft 8. The upper arm of the link is provided with a shoulder 3/ which is in position for engagement with a cam 2f secured to the shaft s, and thelower arm of the link is formed with a claw a; which is likewise adapted to be engaged by the cam t. Below the lever r a slowly rotating shaft a is mounted which carries cam 6 adaated for engagement with lug 10 formed on the link o.

The tilting lever e is connected by a rod 2 with an air valve a controlling the fiow of the air from the filters to the vacuum apparatus.

The operation of the system is as follows: /Vhen shaking takes place the parts are in the positions shown in Fig. 1. The rocker g is out of engagement with the lug b so that the rear end of the lever b is in position for engagement by the cam disk (Z which by its rotation alternately lifts the filter elements and allows the same to fall by gravity. in the meantime the cam Z is out of engagement with the lug w. Therefore, after a few shaking operations the cam t engages the shoulder y and shifts the link o to the left. Thereby the tilting lever a is rocked to the left and into the position shown in Fig. 2. Therefore the rocker Q is set below the lug b so that the rocker can not fall downward and is even slightly raised, the cam surface 9 of the rocker ascending toward its rear end. Therefore the rear end of the lever b is thrown away from the star wheel (Z, and shaking is interrupted. Now the shaft it continues its rotation so that after a while the cam Z engages the lug w and lifts the link o with the claw as into position for engagement with the cam t. Therefore the link is again shifted to the right and it carries the tilting lever e and the rocker 9 along. This step of the operation is shown in Fig. 2 where the claw m is just engaged by the cam a and the rocker Q is about to be thrown to the right. After the lever b has thus been released the shaking operation is repeated.

/Vhile in describing the invention reference has been mace to a particular example embodying the same I wish it to be understood that my invention is not limited to the construction shown in the drawings, and that various changes may he made in the general arrangement of the apparatus and the construction of its parts without departing from the invention.

1 claim:

1. In a filtering apparatus, the combination with the filter, and a rocker supporting the s me, of means for operating said rocker, i is comprising a weighted tilting level or setting said rocker in position out o'l'v engagement by said oper r n'ieans, and mechanism to move saic. setting means into and out oi operative position.

.ln a tilterin; apparatus, the con'ibina tion, with the filter, and 5t-.lOCl 1 supporting; the same, of means for operating said rocker, a rocking supporting member adapted to lift said rocker out of position for engagement by its operating means, and

power storing means connected with said -,:i=.pporting member and adapted to act on opposite sides of the fulcrum thereof.

In a filtering apparatus, the combination, with the filter, and a rocker supporting the same, of means for operating said rocker, a rocking supporting member adapted to lift said rocker out of position for engagement Ly its operating means, and a weig ited tilting lover connected with said Supporting member and adapted to act on opposite sides: of the fulcrum thereof.

4. In a filtering apparatus, the combination, with the filter, and a rocker supporting the same, 01 means for operating said rocker, a rocking supporting member adapted to lift said rocker out or position tor engagement by its operating means, lint connected with said supporting rocking the same and formed with two oppositely directed shoulders, a rotary cam laptoxl to engage said shoulders for inorthe link in one or the other direction,

at in a of its shoulders into position for engagement with said cam. v

in testimony whereof I have aflixed my signature in presence of witnesses.

WlLl-IELM FRIEDRICH LUDWIG BETH.

STRAUSS,

ieinber to; i:

1. means to set said link with either one. 

